class Demo
 {
 public string DemoName { get; set; }
 public Demo() //創(chuàng)建無參構(gòu)造函數(shù)
 {
 this.DemoName = "無參構(gòu)造函數(shù)"; //方法體內(nèi)寫在創(chuàng)建對象時需要初始化的屬性
 }
 }

class Demo
 {
 public string DemoName { get; set; }
 public Demo(string DemoName) //創(chuàng)建帶參構(gòu)造函數(shù)
 {
 this.DemoName = DemoName;
 }
 }
 class Test
 {
 Demo demo = new Demo("帶參構(gòu)造函數(shù)"); //創(chuàng)建對象時在小括號內(nèi)指定值
 }

 class Demo
 {
 public string DemoName { get; set; }
 /*********構(gòu)造函數(shù)重載********/
 public Demo()
 {
 this.DemoName = "無參構(gòu)造函數(shù)";
 }
 public Demo(string demoName)
 {
 this.DemoName = demoName;
 }
 /**********方法重載**********/
 public void SayHello(string name)
 {
 Console.WriteLine("你好，我是{0}，很高興認識你。", name);
 }
 public void SayHello(string name, int age)
 {
 Console.WriteLine("你好，我是{0}，今年{1}歲，很高興認識你。", name, age);
 }
 }
 class Test
 {
 /*********構(gòu)造函數(shù)重載********/
 Demo demo = new Demo();
 Demo demo1 = new Demo("帶參構(gòu)造函數(shù)");
 /**********方法重載**********/
 public void Test()
 {
 demo.SayHello("小明");
 demo.SayHello("小明", 18);
 }
 }